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TAC Research Bulletin

The TAC Research Bulletin highlights recently-published reports and articles from around the world with relevance to road transportation in Canada. Full text links are included, so you get more than just the abstract.

E.g., 09/19/2019
E.g., 09/19/2019
Wednesday, August 28, 2019 - 18:30
Crack sealing is an important preventive treatment in the pavement preservation program. To achieve a cost-effective crack seal, it is important to select a proper crack sealing method. While Minnesota usually seals cracks in asphalt pavements, there is no clear consensus on the most appropriate crack sealing method for a specific job. This study focused on...
Wednesday, August 28, 2019 - 18:30
This research project was conducted with the objective of evaluating the viability of using an automated computer application to detect, classify, and quantify cracks on flexible and rigid pavement surfaces from digital images, to be implemented in the annual Pavement Condition Survey (PCS). Phase I of this project was focused on identification and...
Wednesday, August 28, 2019 - 18:30
Model Systems Engineering Documents for Dynamic Message Sign (DMS) Systems is intended to provide guidance for professionals involved in developing systems engineering documents covering the evaluation, selection and implementation of DMS systems. The full FHWA report is available online at https://ops.fhwa.dot.gov/publications/fhwahop18080/fhwahop18080.pdf...
Friday, July 12, 2019 - 20:00
The European Commission has today published details as to how it intends to put its Strategic Action Plan on Road Safety into practice. This includes a first list of key safety performance indicators (KPI), elaborated in close cooperation with Member States, that will be monitored across the EU to underpin the target of 50% reduction in fatalities and serious...
Friday, July 12, 2019 - 19:45
New shared mobility services have become increasingly common and transportation agencies are beginning to integrate them into regional planning processes. This report provides three case studies of how metropolitan planning organizations (MPOs) and their regional partners are integrating shared mobility into regional multimodal transportation planning. The...
Friday, July 12, 2019 - 19:45
The Smart Work Zone Speed Notification (SWZSN) system aims to alleviate congestion, queuing, and rear end crashes in work zones by informing drivers of the speed of the downstream segment using a type of portable Intelligent Lane Control System (ILCS), Portable Changeable Message Signs (PCMS). The hypothesis was that drivers, knowing the speed up to 1 mile...
Friday, July 12, 2019 - 19:45
Louisiana Transportation Research Center (LTRC) has conducted a research study on LA 493 that provides evidence of damage to roadways caused by inundation. The evidence supporting this comes from three sources: a rod and level cross-section survey taken approximately one month prior to the first inundation event and subsequent cross-section surveys taken after...
Friday, July 12, 2019 - 19:30
The objective of this research project was to develop methodologies for the evaluation of different types of seal-coated, gravel, and dirt roads by using a best-practice-oriented pavement-management system in Illinois. A statewide survey comprised of 13 questions collected 133 responses from county engineers and highway commissioners. Many counties and...
Friday, July 12, 2019 - 19:30
Connected and autonomous vehicle (CAV) technology is evolving at a rapid pace. Transportation agencies must work to develop policies and strategies that will be able to address the organizational, societal, legal and infrastructure impacts of the new technologies. This guide looks at current resources that address these issues, including legislation and federal...
Friday, July 12, 2019 - 19:15
This study compared the fabrication requirements, corrosion resistance, mechanical properties, construction components, and cost of using traditional bridge steels and corrosion-resistant steels. Comparisons were made based on existing literature, discussions with and knowledge gained from industry experts, experimental testing, and field visits. Types of...
Tuesday, June 18, 2019 - 19:00
FHWA's HEPH participated in NCHRP's Domestic Scan of design, operation, and policy decisions SDOTs face when considering accommodating additional modes and services within existing rights-of-way. The scan team visited seven geographically-dispersed projects and utilized a variety of multimodal transportation strategies benefitting bicycle, pedestrian,...
Tuesday, June 18, 2019 - 19:00
Traffic control devices (TCDs) play a critical role in delivering regulatory, warning, informational, and guidance information to drivers.  Transportation agencies devote considerable resources to support TCD installation and maintenance.  However, as connected vehicles develop and vehicle automation becomes a reality, the potential exists to replace...

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